Google Chrome, Firefox, and Thunderbird extension that lets you write email in Markdown and render it before sending.

Welcome to FreeLists, where for more than a decade, we have remained the premiere mailing list host on the Internet. Millions of people from across the globe use FreeLists every day to connect with friends, customers, co-workers, and more. Our focus on science and technology means you're part of a special community.

mmmmail! is a completely ANONYMOUS and FREE disposable Email to RSS service.

The Enkoder Form will encrypt your Email address and convert the result to a self evaluating JavaScript, hiding it from Email-harvesting robots which crawl the web looking for exposed addresses. Your address will be displayed correctly by web-browsers, but will be virtually indecipherable to Email harvesting robots.

Fiesta is the easiest way to create a group email address.

This how-to outlines the steps I used to add a subscribe to Google Groups form on my school website.

Postler aims to be easy, simple, clean, beautiful, and automagic. It handles IMAP beautifully, and provides the user with smart, sensible defaults.

Write your entries by email
Every night we'll email you the question "How did your day go?" Just reply with your entry and it's saved here instantly.
Peek at the past every day
Your nightly email has a random entry from the past. Forget what you were up to a week or a month ago? We'll show you.

The Google Email Uploader for Mac is a desktop utility for Mac OS X that uploads email archives from Apple Mail, Eudora, and Thunderbird (along with other mbox and Maildir archives) to your Google Apps mailbox.

Herald is a notification plugin for Mail.app, Apple's Mac OS X email client. Inspired by the excellent Mail.appetizer plugin, Herald shows you popup notifications whenever you receive new Mail. It also allows you to perform common actions directly from within the notification window, including deleting messages, initiating replies, viewing messages in Mail, or marking messages as read.

Notify provides a simple and elegant way of keeping track of what's in your Gmail inbox. With support for multiple accounts, and a beautiful tabbed user interface, you can't go wrong with Notify.

I made a neat mailto bookmarklet that uses the page title as the Subject, and puts the URL and any selected text into the Body. It was tricky because Javascript wanted to interpert the %0D%0A (crlf) too early, so I had to escape the %’s as %25, i.e. %0D%0A -> %250D%250A -> %22%250D%250A%22 (when surrounded by double quotes).